/**
 * Copyright (c) 2019, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.hardware.graphics.common;

/**
 * Blend modes, settable per layer.
 * @hide
 */
@VintfStability
@Backing(type="int")
enum BlendMode {
    INVALID = 0,

    /** colorOut = colorSrc */
    NONE = 1,

    /** colorOut = colorSrc + colorDst * (1 - alphaSrc) */
    PREMULTIPLIED = 2,

    /** colorOut = colorSrc * alphaSrc + colorDst * (1 - alphaSrc) */
    COVERAGE = 3,
}
